Cruz has plowed more than $240,000 into Facebook advertising since the platform started accepting political ads again two months ago. The only sitting senator who has spent more is Sen. Raphael Warnock (D-Ga.), who forked over $335,000 for ads on the social media giant, according to a POLITICO analysis of Facebook advertising disclosures. Republicans say the approach will help Cruz raise dollars online and cultivate and collect email addresses of small dollar donors. And while the investment could pay off in what’s likely to be an expensive Senate reelection bid — Cruz’s 2018 race against Beto O’Rourke was the second most expensive of the cycle, according to the Center for Responsive Politics — it also could serve the Texas Republican well if he decides to run for president again, which Cruz has said he hoped to do... While Cruz has been focused on building up his small-dollar fundraising for years, the return on investment from his digital ads has increased in recent months, as Republicans eager to push back against President Joe Biden’s agenda have stepped up their giving, a Cruz adviser said.